<template>
  <view v-if="goods_info.goods_price" class="goods-detail-container">
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item,index) of goods_info.pics" :key="index">
        <image :src="item.pics_big" @click="preview(index)"></image>
      </swiper-item>
    </swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品的价格 -->
      <view class="goods-price">￥{{goods_info.goods_price}}</view>
      <!-- 信息主体区域 -->
      <view class="goods-info">
        <view class="goods-name">
          {{goods_info.goods_name}}
        </view>
        <view class="goods-fav">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">
        快递: 免运费
      </view>
    </view>
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    <!-- 商品导航区域 -->
    <view class="goods-nav">
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
    </view>
  </view>
</template>

<script>
  import { mapMutations,mapState,mapGetters } from 'vuex'
  export default {
    computed:{
      ...mapState('m_cart',["cart"]),
      ...mapGetters('m_cart',['total'])
    },
    watch:{
      total:{
        immediate:true,
        handler(val){
          const findResult = this.options.find((obj)=>obj.text === '购物车')
          if(findResult){
            findResult.info = val
          }
        }
      }
    },
    data() {
      return {
        goods_info: {},
        options: [{
          icon: 'shop',
          text: '店铺',
          infoBackgroundColor: '#007aff',
          infoColor: "red"
        }, {
          icon: 'cart',
          text: '购物车',
          info: 0
        }],
        buttonGroup: [{
            text: '加入购物车',
            backgroundColor: '#ff0000',
            color: '#fff'
          },
          {
            text: '立即购买',
            backgroundColor: '#ffa200',
            color: '#fff'
          }
        ]
      };
    },
    onLoad(options) {
      //调用获取商品详情信息的方法
      this.getGoodsInfo(options.goods_id)
    },
    methods: {
      //该方法用于将商品信息添加到购物车:
      ...mapMutations('m_cart',['addToCart']),
      //获取商品详情信息的方法
      async getGoodsInfo(goods_id) {
        const {
          data: res
        } = await uni.$http.get("/api/public/v1/goods/detail", {
          goods_id: goods_id
        })
        if (res.meta.status !== 200) return uni.$showMsg()
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block;" ').replace(/webp/g, 'jpg')
        this.goods_info = res.message
      },
      //点击图片进行图片预览：
      preview(i) {
        uni.previewImage({
          current: i, //当前显示图片的索引
          urls: this.goods_info.pics.map(item => item.pics_big) // 所有图片 url 地址的数组
        })
      },
      onClick(e) {
        //console.log(e)
        //判断点击的是否是购物车按钮:
        if (e.content.text === '购物车') {
          uni.switchTab({
            url: '/pages/cart/cart'
          })
        }
      },
      buttonClick(e) {
        //判断点击的按钮是不是'加入购物车'
        if (e.content.text === '加入购物车') {
          //组织一个商品的信息对象
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.goods_small_logo,
            goods_state: true
          }
          //调用添加商品的方法:
          this.addToCart(goods)
        }
      },
    }
  }
</script>

<style lang="scss">
  swiper {
    height: 750rpx;

    image {
      width: 100%;
      height: 100%;
    }
  }

  .goods-info-box {
    padding: 10px;
    padding-right: 0;

    .goods-price {
      color: #c00000;
      font-size: 18px;
      margin: 10px 0;
    }

    .goods-info {
      display: flex;
      justify-content: space-between;

      .goods-name {
        font-size: 13px;
        padding-right: 10px;
      }

      .goods-fav {
        width: 120px;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        border-left: 1px solid #efefef;
        color: gray;
      }
    }

    .yf {
      margin: 10px 0;
      font-size: 12px;
      color: gray;
    }
  }

  .goods-nav {
    // 为商品导航组件添加固定定位
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
  }

  .goods-detail-container {
    padding-bottom: 50px;
  }
</style>
